Community Profile

photo

Walter Roberson


Last seen: 1 dag ago Active since 2011

I do not do free private consulting. If you want to bring my attention to something, send a link to the MATLAB Answers location. I am currently caught up to T0099119; if you are waiting on a reply from me for an older issue, please send me a reminder.

Programming Languages:
C, MATLAB, Shell, Perl, Fortran
Spoken Languages:
English

Statistics

All
  • Most Accepted 2023
  • Most Accepted 2022
  • Solver
  • First Review
  • Most Accepted 2021
  • Roberson Cup
  • Most Accepted 2019
  • Most Accepted 2018
  • Most Accepted 2017
  • 36 Month Streak
  • Most Accepted 2016
  • Most Accepted 2015

View badges

Content Feed

View by

Answered
I can't comput the following commands
Remove all of the if statements. And convert the && to & A1=sum(total>=90 & total<=100); fprintf('The number of A+ stu...

ongeveer 3 uur ago | 0

Answered
How to perform an operation after reading the image?
readimageFcn=@(x) imagenorm(int16(dicomread(x))); There is some uncertainty here, as imagenorm() is not a defined Mathworks fun...

ongeveer 3 uur ago | 0

Answered
Will there be a Linux ARM binary?
There is no Linux ARM binary. My personal guess is that Mathworks will go for Windows ARM before going for Linux ARM.

ongeveer 3 uur ago | 0

Answered
Append tables with a new variable
T1 = table([1:5].') T2 = table([6:8].', [3;1;4]) vn1 = T1.Properties.VariableNames; vn2 = T2.Properties.VariableNames; new_v...

ongeveer 4 uur ago | 0

| accepted

Answered
Which version suits AGX Orin?
You cannot install MATLAB on AGX Orin.

ongeveer 7 uur ago | 0

Answered
How to calculate and display electricity used in a month using fprintf?
KWH = input('How many KWH this month: '); BILL = 0.066 * KWH; fprintf('Your charge for %f KWH will be $%.2f\n', KWH, BILL)

ongeveer 16 uur ago | 0

Answered
How to compute the following questions
You can use nnz(BooleanArray) or sum(BooleanArray) to get the number of selected results.

ongeveer 17 uur ago | 0

Answered
"Undefined variable" error even though variable is defined
if frame1 == 1 Background1 = thisFrame1; else This does not define Background1 if frame1 ~= 1

1 dag ago | 0

Answered
How do I prevent the command that caused an error being displayed in the command line?
./my_executable xyz: Signal 127 That indicates that ./my_executable could not be found. You are not in the directory you though...

1 dag ago | 0

Answered
How to create this table/matrix?
ForecastInfo = table(CIV.SYMBOL(1:10,:), ForecastDates', 'VariableNames', {'Symbol', 'Forcecast Dates'});

1 dag ago | 0

| accepted

Answered
str2sym error
Work around: symfun('force(t)', sym('t')) or syms force(t)

2 dagen ago | 0

Answered
writetable or dlmwrite to save an array as a txt file
M = [ 1.0000 -26.2000 -31.7000 2.0000 -27.1000 -33.9000 3.0000 -25.5000 -30.2000 4.0000 -24.4000 -30...

2 dagen ago | 0

Answered
I keep getting the error message that the variables must be of data type double and it is currently of type sym.
%I'm unsure how else to run this code to solve the 10 eqn system where %the answer comes out in the correct form, please help ...

2 dagen ago | 1

| accepted

Answered
Hi, this is my code, I want to fit 36 graphs in one graph (36 rays in layout view)
N = 2048; L = 1e4; dx = 4e-3; [x0,y0] = meshgrid((-N/2:N/2-1)*dx); [xL,yL] = meshgrid((-N/2:N/2-1)*dx); [fx,fy] = meshgrid(...

2 dagen ago | 1

Answered
Genetic algorithm gives same result everytime
You have a single variable that is integer constrained between 10 and 100. That is only 91 different values to search, at most -...

2 dagen ago | 0

| accepted

Answered
How can I displace x and/or y axes from existing positions?
There is no provided way to do this. You will have to turn axes off, and draw the axes yourself.

3 dagen ago | 0

Answered
Fastest possible prime number detection without using break or return
The fastest possible way of doing any computation depends upon the fine details of your CPU, and upon the fine details of how me...

3 dagen ago | 0

Answered
Processing Multiple Files at once.
[filelist,pathn] = uigetfile('*.*','Please Select a Par File in .dat or .txt', 'multiselect', 'on'); if isnumeric(filelist); er...

3 dagen ago | 0

| accepted

Answered
Uploading .mat files that contain nested structs into a datastore
data = matfile(filename, variables{1}); That is the wrong way to use matfile. The proper way to use matfile is matObj ...

3 dagen ago | 0

Answered
How can I skip the rest of an if statement?
if n > 1 while true if a == 1 disp('Haha') break % (Here is where I want to skip the res...

3 dagen ago | 0

| accepted

Answered
ginput error in matlab 2020a
Error in contains (line 36) tf = ~cellfun(@isempty, strfind(s, pattern)); ... Except that contains is a built-in function and ...

4 dagen ago | 0

Answered
How to determine if angles match
You would get that behavior if prec1 or prec2 are non-scalar and it does not happen that all of the values pass the tests.

4 dagen ago | 0

| accepted

Answered
How to run a function in app designer?
psi = app.EditField_psi.Value; phi = app.EditField_phi.Value; theta = app.EditField_theta.Value; m = app.EditField_m.Value; ...

4 dagen ago | 0

Answered
No sound when playing movie in Matlab2020b
%dispMoviesMatlab - ComputerVision Toolbox audiopath = 'C:\Users\maxab\OneDrive\Desktop\Masters\Experiment\Movies\Chosen'; m...

4 dagen ago | 0

Answered
Where is Shader graphics available in MATLAB
The only access is shading (not very extensive)

4 dagen ago | 0

Answered
vectorized operations on symbolic functions
syms x1 x2 x3; % symbolic variables y = x1^3/3 + x2^2/2 - x3; % symbolic function y X = rand(500,3); % each row representing a...

4 dagen ago | 0

Answered
Slice command for terrain
No. Your data cannot be sliced. Perhaps you might want to contour() the data, and get back the contour matrix, and use somethin...

4 dagen ago | 0

| accepted

Answered
Extract color map from png apply to grayscale image
Use rgb2ind() on the colored image, and take the second output as being the color map. [~, cmap] = rgb2ind(TheColoredImage); i...

4 dagen ago | 1

| accepted

Answered
how to perform a multi variable optimization on matlab
There are several different minimizers possible. Everything except fzero() -- fzero() is restricted to one variable. The trick ...

4 dagen ago | 0

Answered
Binary GA returns floating point numbers
% Set seed for reproducability rng(42); % Load data and define arrays data = readmatrix('Data/File_S1.xlsx'); X = data(2:e...

4 dagen ago | 0

Load more